Celebrate orchid blooming season on Friday, November 4 – Sunday, November 6, from 10 – 4 at the Lyman Estate Greenhouses, 185 Lyman Street in Waltham, sponsored by Historic New England. Hundreds of orchid plants are for sale, including many hard-to-find varieties. Visit the greenhouses and enjoy gorgeous floral colors, shapes, and scents. Among the many varieties on display and for sale are cattleyas, laelias, oncidiums, Paphiopedilum, and Phalaenopsis. Their long-lasting and showy blooms make orchids a dramatic addition to any indoor environment and this adaptable species can be grown in a variety of home conditions. Free admission. For more information, call 781-891-1985, or visit www.historicnewengland.org.